The insulated Gates A and B are kept closed and their fans turned off unless the user wants to cool the house. For example let's assume that Gates A & B are kept closed during a 24-hour period. Also let's assume the water is only frozen once every 24 hours at 5 AM and that the water/ice reservoir contains 5 kgs of water and only 1 kg of ice melts in a 24 hour.

If the user wants to cool the house, he opens gates A & B. The hot outdoor air enters the ice/water reservoir. Once the hot air hits the ice chilled water, it's temperature drops. The cold air exits the reservoir into the home through opening A and more ice melts than would otherwise - if gates A & B were kept closed. If all the ice melts (4 kgs to cool the house) and the temperature of the water rises above 0 ⁰C a thermostat detects the raise in water temperature and automatically closes the gates overriding the user's control.  As the hot air enters the water/ice reservoir, the air cools down and cold air exits into the home.
        
To reduce humidity gates A and B are connected through a heat conductive pipe that zigzags through the water/ice reservoir maximizing heat exchange before exiting through gate A into the home - see below. Hot humid outdoor air enters gate B and cold dry air exits gate A into the home.

Gates A & B are connected by a heat-conductive Pipe. As the hot humid outdoor air flows through the pipe it loses it's heat and humidity.	Magnified view of the left figure. Through a small hole at the bottom of the heat-conductive pipe, water is drained out of the pipe.

This energy/electricity savings % is relative to an identical (in size, model, style, etc.) refrigerator and A/C that does not freeze water at night.